Valved connection for rock-drills.



S. W. BROTHERS.

VALVED CONNECTION FOR ROCK DRILLS.

AYPLIUATION FILED FEB. 3, 1911.

Patented Oct. 14, 19.13.

with

.saaroan w. isnomrrnns, or Damian, COLORADO.

maven 'connne'erzon r011 MGK-DRILLS.

Specification of Le'ttersll'atent.

Patented oeeia, 1913..

a mation-m d greener 3, 1e-1'1. :SerialTo. 606,411.

To all whom it may concern Be itknown that :I, SAZNEEORD W. BROTH- are aeitizen-of 'the 'United States, residing at enver, in the county of'Denver and State of-Colorado, have invented certain new and .usefulimprovements in \Valved Connections for Rock l'h'ills; and I do herebydeclare the following to be a full,icl,ea'r, and exact description ofthesame, reference being bad to the accompanying drawings, forming a-pa'rtof this (specification, andto the-figures and letters reference markedThe present invention has for its object tie-provide an improved-formo'f-valved connection through-which water is supplied to the modernelastic fln id operated rock drills, the Watersupply being incommunication with the steel'or'tool and thrmigh it discharging into theopening being formed thereby and in connection with the exhaust or asuitable air supply from-the pressure system serving to elearthe openingof debris.

Referring to the accompanying drawings-Figured is a sectional view takenthrough the head of a rock drill and show-v ing the valved watersupplyconnections of the present invention; Fig. 2 is a horizontal crosssection through M-M, showing the arrangement and form of the clip andconling.

Like letters of reference in the several figures indicate the sameparts.

The letter A indicates the head or rear cap of a rock drill which lattermay be of the construction heretofore patented by me. The head isadapted to be held in place by long rods or bolts indicated at B in saiddrawing. At one side of the center the head A is formed with a lug orbracket A, and at the center with a threaded aperture into which one endof a nipple C is adapted to be seated. Secured in the nipple C andprojecting into the drill so as to cooperate with a passage through thehammer is a tube 1) through which the water passes into the drill andthrough the latter into the drill steel, all as is well known in theart.

The nipple C before referred tb is threaded at its outer end and adaptedfor the reception of a threaded boss on the body E of the valve. Thevalve body E has its major axis transverse of the nipple C, and at oneend is internally threaded for the reception of a threaded valve stem 1*adapted to work through a packin gland inclosed by the ca Gr-threaded onthe outsideof the end of t e valve body. In the preferred construction,the packing itself is in the form of two-washers, one, indicated by thelottery, overlying the end of-the body of the valve, and the other,indicated by the letter 9, seated in .a-reeess in the end of the valvebody immediately around the valve stem, so as to prevent the ingress ofdirt or the escape of waterfrom the body.

The opposite end of the valve body is formed with an inwardly openingconical seat hinto which the tapered end 1*" of the valve stem passes,andby means of which the qdan-tityof water admitted may be accuratelyregulated. It is to be noted however that the opening into the taperingseat or passageway is relatively large at its smaller end, whereby thelodg-ment of dirt therein is avoided, as will be hereinafter moreparticularly pointed out. The end of the body of the valve containingthe seat is externally threaded for the reception of a clamping nut Kwhich atits outer end is formed with an internal tapering seat is forthe reception of a correspondingly tapered end of a nipple L. The nippleL is at its inner or larger end provided with a projection or extensionZ terminating at a point in proximity to the entrance opening of thevalve seat, and the chamber I around said projection is adapted for thereception of a coiled spring I. to hold the tapering nipple seated withsufficient pressure to prevent the escape of water, but at the same timepermit the said nipple to swivel in the nut or coupling K, whereby theangular position of the drill with relation to the water pipe connectionmay be varied at will without unduly straining the valve or partsassociated therewith. To overcome any possibility of the strain whichmay be transmitted through the water pipe, injuring or loosening theparts, as Well as to prevent any possible displacement of said parts dueto the excessive vibration to which they are subjected in the use of thedrill, the coupling K is housed and preferably clamped .in a clip M,shown in Fig. 2. Said clip is held in place by a bolt M passing throughits ends and through an aperture in the lug or bracket A on the drillhead.

In the preferred construction, provision is i made whereby the entry ofdirt into the valve and drill through the water pipe con-' nections isprevented, by making the open ing or bore of the swivel nipplerelatively small, as compared with the internal diameter of thewaterpipe connectionindicated by the dotted km. 0 in Fig. 1. Theaperture through the swivel nip le is in effect the smallest aperturethrong which the water passes on its way from the water pi e connectionto the opening, being formed 8 the drill steel, and consequently dirtwhich I will enter through the swivel nipple may mines and underconditions where it must be subjected at practically all times while inoperation to the action of grit and dirt of all kinds, aswell as j-tothe action of water which necessarily carries a large quantity of gritand dirt. The construction is not only simple and exceedingly effectivein that it does not cause the drill to be hampered by the water pipeconnections and permits of a most accurate and ready control of thewater supply so that it may be properly proportioned to the air orexhaust from the drill J v to eifectually clear the drill hole of thematter loosened by the action of the drill itself.

Having. thus described my invention, what I claim and desire to secureby Letters Patent of the United States, is:

1; The combination with a rock drill head having a central threaded portand a lug projecting at one-side of the port, of a nipple mounted in theportand a valve carried thereby, said valve provided with a recess atits inlet end, an inlet fittin for said valve comprising a tapered swivenipple having,

a central elongation projecting within a recess in the valve body, aspring encircling the elongation and in contact with the walls f of therecess, a coupling engaging the valve body and having a seat for thetaperednipple; and a clip carried by the lug and cooperating with thecoupling to lock the parts in position.

2. The combination with a rock drill head having 'a central threadedaperture, and a lug projectingat one side of said aperture, of a nipplemounted in the aperture, a valve body mounted on the nipple and having avalve stem arranged transversely to said nipple, a swivel nipple andcoupling connecting said nipple with the valve body and a clip inclosingsaid coupling and connected with the lug on the drill head' whereby thecoupling and valve body are securely held in position, substantially asdescribed.

SANFORD W. BROTHERS. Witnesses:

ORVILLE W. Bno'rnnns, RALPH W. ECKHARDT.

